Blast-furnace.



No. 795,139. PATENTED JULY 18, 1905. I

Q N. M. LANG-DON.

BLAST FURNACE.

APPLICATION FILED JUNE 3, 1903.

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NITED STATES Patented. July 18, 1905.

NELSON M. LANGDON, OF MANCELONA, MICHIGAN.

BLAST-FURNACE.

SPECIFICATION forming part of Letters Patent No. 795,139, dated July 18, 1905.

Application filed June 3,1903- Serial No. 159,963.

1'0 ul/ lull/0m, it may concern:

Be it known that I, NELSON M. LANeDoN, a citizen of the United States, residing at Mancelona, in the county of Antrim and State of Michigan, have invented new and useful Improvements in Blast-Furnaces, of which the following is a specification.

This invention relates to a new and improved method of jacketing or casing blastfurnaces; and the invention consists in the combination, with the furnace, of a casing or jacket made in sections properly secured and held together by means of bolts and nuts, as hereinafter described and claimed.

The objects of my invention are, first, to furnish an eflicient means for holding together the walls of the furnace to which the jacket is applied; second, to prevent the formation of horizontal ridges and corrugations in the inner walls of the furnace; third, to furnish a casing or jacket which can be readily and quickly applied and secured upon the outer surface of the brick walls; fourth, to furnish a casing or jacket that can be readily and quickly repaired by removing and replacing in one or more sections which form the jacket; lifth, to combine with each section of the jacket plates, lugs, or projections forming an integral part thereof, and bolts so applied as to bind the jacket in position upon the walls and to exert no tensile strain upon the lugs which furnish bearings for the bolts or upon the sections of which the lugs are an integral part; sixth, other objects hereinafter described and claimed. These objects 1 accomplish by means of the mechanism illustrated in the accompanying drawings, in which- Figure 1 represents an elevation of a part of a blast-furnace with one of the walls partially in section, said section being taken through the center of one of the twyers. Fig. 2 is a plan View of a part of the surrounding jacket. Fig. 3 is an elevation of two of the sections of the jacket, on an enlarged scale, showing my preferred form of lugs and the arrangement of the tightening-bolts, the dotted lines in this figure showing the position of the water-pipes within the jacket. Fig. 4 is a sectional view on the line X X of Fig. 3.

Similar letters refer to similar parts throughout the several views.

B B are columns supporting the mantle A and may be constructed in any suitable manner. The mantle A, which is supported by the columns, in turn supports the casing or shell (J and also the inner walls D in the usual manner.

E represents the crucible-wall, which incloses the crucible or hearth F. The crucible-wall is provided with a plurality of twyers (shown by GG Gr) constructed in anysuitable manner.

H is the bosh-wall, which is inclosed by my improved jacket, the jacket being composed of metal plates or sections, (shown by J J J, &c.) Each section is preferably provided with an internal coiled pipe for receiving water and keeping up a flow, as hereinafter described. This coiled pipe is shown by P. It has an inlet Q and an outlet 0 near the outer surface of the section, through which the water is caused to circulate by any suitable means for the purpose of keeping the jacket cool, thereby protecting the jacket and the bosh-walls from the intense heat and fluxing action of the invclosed material. Each of the sections of the jacket is provided on its outer surface intermediate of its ends with a series of lugs or projections forming an integral part thereof, (shown by K K K, &c.,) and these lugs form bearings for the binding bolts L L L, &c. In my preferred form of construction the lugs K are projections on the outer curved surface of each section at about the vertical center and form an integral part thereof, placed just far enough apart to receive the bolts between them in a substantially straight linethat is, each end of the binding-bolts lies between a head, nut, or key bearing on the ends of two of said lugs and at the other end a nut, head, or key bearing on the ends of two of the lugs on the adjacent plate, as shown.

In applying the oppositely-extending bolts to the lugs the pressure is always compressive on the lugs, so as'to prevent the breaking or D the severing of the lugs from the plates of the 1 jacket. The arrangement of both the bolts two lugs of adjacent plates, and each bolt has,

and of the lugs, which are an integral part of the jacket-sections, the head of one of the bolts acting on one end of the lugs and the head of the other adjacent bolt acting upon the other end of the same lugs, while nuts or keys on the other end of the bolts act in the same manner, is such that it relieves the lugs from all tensile strain and from all pressure excepting that of compression, while the sections of the jacket other than the lugs are relieved from all strain that would tend to tear them asunder, and at the same time the jacket is retained securely in place. This arrangement also allows for the ready removal of any part of the jacket for repairs, as the binding-bolts can be readily and quickly re moved by loosening the nuts on the ends of the bolts, and the jacket can also be readily and quickly applied and readily and quickly adjusted.

I have described my preferred method of constructing the jacket with lugs and bolts and the means for securing the said jacket upon the furnace-walls; but I do not wish to limit myself to the specific form of lug shown in the drawings, as it is evident that any form of lug and arrangement of bolts acting to compress the lugs will be within the spirit of the invention. The invention presents ajacket having the securing-lug thereon, which obviates the use of separate columns and connecting -links between the sections of the jacket,-thus performing by a single part the functions of two or more devices previously used, while the slotted construction of the lug permits the bolts to be readily withdrawn even if bent laterally, which frequently occurs under strain in this class of devices, so that their removal from an aperture is rendered difficult. The disposition of the lugs at the vertical center of the curved face of the plates allows a direct pull from one plate to the other, thus forcing the abutting edges 7 together to form a joint in the line of the arc comprising the exterior periphery of the jacket. This construction not only draws the plates together, but the passage of the rods over the joint between two plates forms a support which braces the plates at the point of juncture and materially improves the construction of the jacket as a whole.

Having thus described my invention, what I claim to have invented, and desire to secure by Letters Patent, is

1. A furnace bosh-jacket comprising a series of abutting plates each having an independent socketed lug secured thereto between the opposite side edges thereof, and bolts extending from said lugs upon one plate to a similarly-disposed lug upon adjacent plates at opposite sides thereof whereby individual plates of the series may be removed without disturbing adjacent plates or their fastenings.

2. A furnace bosh-jacket comprising a series of abutting plates each having an independent lug provided with open sockets secured thereto between the opposite side edges thereof, and securing-bolts mounted in said sockets for direct lateral removal therefrom and extending in opposite directions from each of said lugs to a similarly-disposed lug upon an adjacent plate.

3. A furnace bosh-jacket comprising superposed series of abutting plates each-having an independent lug provided with open sockets upon its outer face and secured to said plate between the opposite side edges thereof, securing-bolts extending in opposite directions from the lug upon one plate to the lugs upon adjacent plates, and circulation-coils incorporated in the body of each of said plates.

4. A furnace bosh-jacket comprising superposed series of segmental abutting plates each having an independent lug provided with a series of open sockets upon its outer face and secured to said plates between the opposite side edges thereof, and securing-bolts mounted in said sockets for direct lateral removal therefrom and extending in opposite directions from each of said lugs to a similarlydisposed lug upon an adjacent plate whereby said bolts may be removed to release a plate without disturbing the adjacent plates upon the opposite sides thereof.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

NELSON M. LANGDON.

Witnesses:

THoRNE D. EARLE, H. N. CAMPBELL. 

